Evaluation of Acoustical Materials for Automobile Bodies 640145
Automotive body sound control materials chosen for a new model are based on the preceding year's sound package. Modifications are made and tested on actual prototype vehicle installations. The variety of materials used are classified as dampers, barriers, and absorbers, and their properties are evaluated in the laboratory by special types of apparatus. This paper reviews these materials and tests as well as other requirements that are important for performance, durability, and processing.